cops and gangsters

so if you have played zone graal you know that there is many small events like capture the flag for money. so my idea is: what about to make new location as big as era CTF and there will be big battle in which cops and gangsters will kill each other. it will be like team spar but there must not be admins. so players just go to the npc and say that you want play. then you must wait for like 3 mins and will come other people. team which will win team spar on big map will recieve 500 gralats. so if there will survive like 10 members of cops then they will have 50 gralats each